More to the point, I dare someone to come up with a practical, simple suggestion for how to prevent 'clanning' that isn't nightmarishly difficult to enforce. Heck, I dare someone to come up with a definition of 'clanning' in the negative sense that's shorter than a paragraph and more specific than 'I'll know it when I see it'.
Exclusive on unreasonable grounds, co-ordinated without in-character messages being sent. ?
